Remove '-b' from AIDL

An empty file will be emitted for parcel declarations. Now sources may
inclue parcel definitions.

Bug: 70046217
Test: manual

Change-Id: I8087416ae7806399c3514d18faeadb858f07bf88

java/java.go

@@ -531,7 +531,7 @@ func (j *Module) aidlFlags(ctx android.ModuleContext, aidlPreprocess android.Opt
 	aidlIncludes = append(aidlIncludes,
 		android.PathsForSource(ctx, j.deviceProperties.Aidl.Include_dirs)...)
 
-	flags := []string{"-b"}
+	flags := []string{}
 
 	if aidlPreprocess.Valid() {
 		flags = append(flags, "-p"+aidlPreprocess.String())